Jennifer Connelly
Daniel Boczarski/Getty
The actress, 40, welcomed daughter Agnes Lark on May 31 in New York City, her rep confirms to PEOPLE.
The actress had a scheduled home water birth only three days after strolling with her family in New York.
Their new addition joins big brothers Stellan, 7½, and Kai, 13, Connelly's son from her previous relationship with David Dugan.
The couple, who first met while filming A Beautiful Mind and later wed in Scotland in 2003, confirmed the pregnancy in December.
